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Natural park · Areguá, Central
Monumento Natural Cerro Koi
A hill at the edge of Areguá with sandstone formations in columns of six to eight sides, similar to honeycombs, protected as a Natural Monument since 1993, together with the neighboring Cerro Chororí.
Illustrative images. The pictures in this guide are illustrations based on the real place, not photographs, and may differ from it.
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About Monumento Natural Cerro Koi
Cerro Koi is a small hill about 2 km from the centre of Areguá, known for sandstone formations in six- to eight-sided columns, fitted together like honeycombs. The rocks formed millions of years ago, and the geometric pattern appears on the walls and on loose blocks among the vegetation.
The hill was declared a Natural Monument in 1993, and the protected area includes the neighboring Cerro Chororí. Short trails climb between the rocks and vegetation to the points where the columns are exposed.
The visit is short and pairs well with a walk through Areguá's centre. The rocks can become slippery after rain.
It's a place for those who enjoy geology and a bit of walking. Bring water and closed-toe shoes.
Before you go
Practical information
Cidade Turismo reviews its information regularly, but something may have changed. Check with the place before planning your trip.
How much time to set aside
About 1 to 1.5 hours for the trails and the formations.
Best time
In the morning or late afternoon, avoiding the midday heat. After heavy rain, the rocks become slippery.
How to get there
It's about 2 km from Areguá's centre. You can go on foot, by taxi or by car. Check locally which access points are open to visitors.
Tip
Wear closed shoes with good grip and bring water. The columns show up best with side light in the early morning or late afternoon.
Get your questions answered
Frequently asked questions about Monumento Natural Cerro Koi
What's special about Cerro Koi?
Sandstone formations in six- to eight-sided columns, fitting together like honeycombs — rare to see in this form.
Is the trail difficult?
No. They are short trails with gentle climbs among rocks and vegetation. Wear closed-toe shoes.
Is it far from downtown Areguá?
About 2 km. You can go on foot, by taxi, or by car.